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| Number | Title | Issue Date |
| 7624819 | Universal joint assembly A universal joint assembly includes an assembly housing, an assembly cap coupled to the assembly housing, a rotatable mandrel, a plurality of substantially spherical drive balls, and a floating washer. The assembly housing has a plurality of pockets formed in an int... | 12/01/2009 |
| 7549487 | Mandrel and bearing assembly for downhole drilling motor A downhole drilling motor beating assembly includes a tubular mandrel adapted to connect to a rotational power output of downhole motor. The bearing assembly includes a mandrel having: an upper end proximal to the downhole motor, a lower end with a pin connection di... | 06/23/2009 |
